This is especially useful when you regularly switch between different tasks on your PC. For example, it would be especially useful if you had to go from typing on a white background (as per normal) to playing a game that is fairly dark, such as Dead Space.
'CTRL ALT ' to increase and 'CTRL ALT -' to decrease, with these two simple shortcuts you can control the gamma range on your computer perfectly. Of course, you can also select a key to act as default so you can return to the normal settings quickly.
Gamma Control is a very useful application for anyone using their computer for distinct purposes. You can avoid hurting your eyes and save a lot of time changing the gamma range manually on the screen itself.